体积的涨缩变化产生了地震道上的正、负振幅。

These changes in volume contribute to the positive and negative amplitudes of a seismic trace.

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薄纸在制卡和会员卡制作中为什么会发生涨缩变形问题？

Tissue paper in cards and membership cards in the making of why mandrel deformation?

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旋击盘周边均布100 ~ 120个旋击头和多个涨缩槽。

Around rotating plate there are 100-120 rotating heads and many collapsible grooves.

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